The following cheats are available by typing in the given codes, one character at a time: - trigods - Invincibility toggle. - trishld - Restore shields. - trinext - Skip to the next level. - trihovr - Hover in place. - trifir8 - Afterburner. - maniacs - Afterburner. - triburn - Fast afterburner. - trscope - Toggles music oscilloscope. - trframe - Count frames per second. - trwarpX - (where X is a level #) Warp to level X of current episode. - 3drealm - "Smokin'"; power up everything. - trifir9 - Thirty seconds of invisibility. - trifir0 - Thirty seconds of invincibility. - trifir1 - PAC ammo. - trifir2 - ION ammo. - trifir3 - RTL ammo. - trifir4 - MAM ammo. - tifir5 - SAD ammo (registered version only). - trifir6 - SWT ammo (registered version only). - trifir7 - DAM ammo (registered version only). Extra Keys: Each of the following must be invoked from the main menu. If they don't work on their own, try holding [ctrl] down before pressing the desired letter. [Z] - Display benchmark statistics for your computer. [M] - Play a MOD file. - Play a TVI animation file. [S] - Sound debug mode. [R] - Record a demo. [P] - Play a demo. Source: 3D Realms Website